# Scientists Pinpoint Noise Source in Silicon Spin Qubits
Researchers from Tokyo University of Science and Japan’s National Institute of Advanced Industrial Science and Technology have cracked a major mystery: what causes frequency instability in spin qubits—quantum processors that encode information using electron spin states.
The team used large-scale simulations to model how charge noise from microscopic defects called two-level fluctuators disrupts qubit performance. They discovered that rapid-switching charge traps near semiconductor interfaces are the culprit, and that operating at a warmer 200 millikelvin (rather than the typical 20 mK) paradoxically improves quantum gate accuracy—the precision of quantum operations.
By evaluating over 100 million simulated configurations, the researchers identified that electronic transitions at semiconductor boundaries generate most of the problematic noise. Their work suggests that refining fabrication techniques to control these interface defects could stabilize future large-scale quantum computers and reduce errors.
[Read the full article on The Quantum Insider.](https://thequantuminsider.com/2026/06/05/scientists-identify-the-origin-of-noise-in-spin-qubit-quantum-processors/)